Product Description

P300 is a rigid, closed cell, preformed, unfaced, polyisocyanurate foam material (polyiso). This CFC and HCFC free product provides outstanding physical properties in applications having a service temperature between –297 and +300°F (-183 and +149°C). P300 is teal in color and is available in blocks, sheets and fabricated shapes.

Physical Properties 1, 2	ASTM Method	Typical Values English	Typical Values Metric
Density	D1622	3.0 lb/ft³	47.9 kg/m³
Thermal Conductivity,k-factor⁴ Initial at 75°F (24°C) Aged 10 days at 158°F (70°C)	C518	0.165 (BTU·in)/(hr·ft²·°F) 0.185 (BTU·in)/(hr·ft²·°F)	0.024 W/(m·°C) 0.027 W/(m·°C)
ThermalConductivity, R-value per inch⁴ Initial at 75°F (24°C) Aged 10 days at 158°F (70°C)	C518	6.0 (hr·ft²·°F)/BTU 5.4 (hr·ft²·°F)/BTU	1.06 (m²·°C)/W 0.96 (m²·°C)/W
Compressive Strength /Modulus Parallel to Rise APerpendicularto Rise5	D1621	65 / 1,400 lb/in² 40 / 800 lb/in²	448 / 9,646 kPa 275 / 5,512 kPa
Shear Strength / Modulus Parallel to Rise Perpendicular to Rise⁵	C273	35 / 450 lb/in² 30 / 400 lb/in²	241/ 3,100 kPa 206 / 2,756 kPa
Tensile Strength / Modulus Parallel to Rise Perpendicular to Rise⁵	D1623	60 / 1,711 lb/in² 50 / 1,054 lb/in²	413 / 11,789kPa 344 / 7,263 kPa
Flexural Strength / Modulus Parallel to Rise Perpendicular to Rise⁵	C203	88 / 2,189 lb/in² 47/ 1,013 lb/in²	606 / 15,082kPa 324 / 6,980 kPa
Closed Cell Content(by volume)	D6226	95%
Water Absorption (by volume)	C272	0.6%
WaterVaporTransmission	E96	3.0 perms·in	4.4 ng/Pa·s·m
Dimensional Stability6 (length / volume change) +158°F(70°C),97 ± 3% relativity humidity,14 days -40°F(-40°C), ambientrelativity humidity,14 days +212°F(100°C), ambientrelative humidity,14 days	D2126	+0.5 / +2.2% -0.1 / +0.2% -0.2 / -0.1%
Coefficient of LinearThermal Expansion 0 to +250°F (-17 to+121°C)	E228	35 x 10^-6 in/in·°F	63 x 10^-6 mm/mm·°C
Hot Surface Performance at 300°F (149°C)	C411	Pass
Polyisocyanurate Insulation Requirements	C591	Grade 2,Type III compliant